CurtPalme.com Home Theater Forum

Crzee8s · Joined: 27 Aug 2008 Posts: 13

Hi.

I stumbled upon this forum thru lumenlab.com, and found it very interesting. I built a LCD pj based on the lumenlab design but when i was finished i wanted to try something new.

i picked up a very cheap sony 1031q with nearly new tubes earlier in the week and am looking through various posts and setup instructions and still had a few questions..

1) i am trying to perform the convergence and am having issues with the horizontal tilt for the green tube. the red and blue tubes have horizontal tilt knobs, which i can use get the r & b tubes level, but the green doesn't have any. I look in the green tube at the raster after i center it and sure enough it looks tilted, just as it does on the wall. how do i fix this?

2) the blue lens has some sort of UV coating on it that is flaking off in some spots. i cant really tell if this is affecting the picture or not as i am only working with the hatch pattern now. however, i do have a problem with the center and corner focus only on this lens. i have played with the two focusing mechanisms on the lens, and can go from out of focused, to marginally focused, to out of focus again as i move the focusing mechanism from one side to another. It seems like my lens spacer is correct, but the sharpness isnt there like it is on the red or green. should i try and pull all the UV coating off? it looks a bit hazy when i look into the lens at the tube like someone got some muck on it.

3) i plan on using a HTPC for the signal and understand about the max scan rate, and negative sync. if i am using power strip, what is the box i have to keep below 36khz to prevent from damaging the pj? i plan to use the RGB2 connector with a HD15 adapter. Also, if there is a setting for 1080i that people are using with the 1031q, the values would be appreciated.

4) if i run my pc at 640x480 will that fry the pj? that to me sounds like 480p in full screen mode and should be OK.

Thanks so much, and sorry for the newbie questions.
Greg

CRT_Ben · Joined: 28 Aug 2006 Posts: 1684 Location: Northern Virginia

**Curt Palme** · Posted: Wed Aug 27, 2008 10:07 pm Post subject:

Ben pretty much nailed everything. I wouldn't try 1080i, if the computer defaults to something higher while playing with it, you'll toast the set. Once you get to see 480p on a CRT, you'll love it, and will want to upgrade down the road.. Smile

Crzee8s · Joined: 27 Aug 2008 Posts: 13

wow thanks for the thorough and quick response!!! its nice to see that there are some receptive people out there who dont mind helping someone new to the hobby Razz

One of the main reasons I wanted to try analog was because I was running a 140" 4:3 screen with the lumenlab lcd pj (LCD was only 1024x768 native), but could not see past the lack of ability to focus corners and the screen door effect. i already like all the flexibility i'm seeing on the crt with all the adjustment knobs.

i appreciate all your help. i'm sure ill have more questions as i go Razz

and yes i originally wanted something more like a barco 800 series, but i thought for this set would be a good way to start and it was a good price at $50.

Thanks!
Greg

stuffandpuff · Joined: 30 Jul 2008 Posts: 69

Zebu Fellenz · Joined: 21 Dec 2006 Posts: 2567

Satanier · Joined: 25 Aug 2008 Posts: 185

What's interesting though is that his lumenlab outputs less lumens than this CRT, so it would be an improvement for him on the same screen, would it not? Or does CRT lumen rating drop exponentially as screen size increases?

Crzee8s · Joined: 27 Aug 2008 Posts: 13

well.. im willing to compromise my screen size for picture quality. i took another look at my screen size, and it is about 9' wide, so a 135" diag on 4:3.

the bulb in my diy projector is a 400w metal halide... i know that most people get around 250 lumens out of good projectors over there... so i figured that a 600 lumen crt should be at least good..

one question i have though, at what point or distance is the lumen output measured? i am completely happy with my light output my diy pj... my screen is just white flat ceiling paint. the corners are a bit dimmer but by nature of the design, that is tough to avoid.

hence i would expect at least this bright of a picture from the 1031. for some reason the forum is timing out when i try to upload a picture of it... hmmm.

Greg

**AnalogRocks** · Posted: Sun Aug 31, 2008 3:59 pm Post subject:

Gamby · Joined: 07 Jan 2008 Posts: 15

Crzee8s · Joined: 27 Aug 2008 Posts: 13

I have a radeon x1950 pro which seems to work fine. some of the interlaced resolutions wont appear on the monitor, but will still show on the CRT.

I'm still having some focus issues with my blue, and currently the pj is not powering up very long since removing the lens block assy. i dont think the focus issue is related to the interlaced res i am trying to run 1024 x 768i, and the lens itself looks super clean as does the face of the tube... are you able to get your interlaced resolutions to converge well? how is the sharpness (ie desktop text)?

thanks
Greg